BioMax
+1y
That frame does look VERY nice! When I design A-arm systems for vehicles on air I will typically run the arms close to parallel (never parallel though, A-arms need instant center too) and the upper arm is close to the same length as the lower arm. I don't do that on purpose, that is just how it all comes out when I design it all on paper. Make some "paper dolls" with poster board and use thumb tacks for pivot points and just play around with it, you will see how moving the upper arm up and down and longer and shorter makes a LOT of difference in how the suspension cycles.
My rule of thumb, on an air bagged vehicle is 1/2